Is Rincon Valley, AZ tap water safe?
The short answer
1 of the 6 utilities serving Rincon Valley has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Spanish Trail Water Company.
City of Tucson, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 63.7 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Rincon Valley’s ZIP codes, from EPA’s estimates.
- Open report
City of Tucson
Arizona · serves 732,906 people · about 3,900 in Rincon Valley
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 63.7 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Vail Water Company
Arizona · serves 17,500 people · about 620 in Rincon Valley
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 38.5 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Tucson Water Corona de Tucson
Arizona · serves 10,217 people · about 450 in Rincon Valley
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 32 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Spanish Trail Water Company
Arizona · serves 3,822 people · about 150 in Rincon Valley
Nothing in its records is above a health goal.
1 health-based violation since 2016
- Open report
Saguaro Water Company
Arizona · serves 3,243 people · about 120 in Rincon Valley
1 result above the health goal. The worst: Arsenic at 1.4 ppb, above the health goal.
No health-based violations since 2016
- Open report
Gw Ocotillo Water - Thunderhead
Arizona · serves 153 people · under 100 in Rincon Valley
Nothing in its records is above a health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of Tucson’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Rincon Valley
The 3 labs Arizona certifies closest to Rincon Valley, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Turner Laboratories, Inc.
Tucson, AZ · about 15 miles
Complete Analytical Services, LLC
Tucson, AZ · about 15 miles
Legend Technical Services of Arizona, Inc. DBA Legend Analytical
Tucson, AZ · about 15 miles
Which ZIP codes are in Rincon Valley: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Arizona Department of Health Services, Arizona certified commercial drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Rincon Valley
Other towns in Pima County with a page of their own.
What to do next
- Read City of Tucson’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water